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ATARI welcomes you to 
the fascinating world of 
home computing. 

Your new ATARI 
1200XL Home Computer 
is one of the most power- 
ful and versatile small 
computers you can buy 
for the home. It's a prac- 
tical computer with a 
functional, low-profile 
design that complements 
any home environment. 

The information in this 
guide will make your 
transition into the world 
of home computing 
smooth and enjoyable. 

First, you'll find easy-to- 
follow instructions for 
connecting your ATARI 
1200XL Computer to your 
television set— it's no 
more complicated than 
hooking up an antenna to 
your TV. Then you'll 
learn what to do after 
you turn the computer 
on. Your ATARI 1200XL 
Computer's key features, 
including its keyboard 
and built-in diagnostic 
self-tests, are described 
in detail. 

"Where To Go From 
Here? There's a World 
of Possibilities" (page 13) 
offers valuable informa- 
tion that will help you 
pick accessories and 
ready-to-use programs 
for your new computer. 

You'll also find a copy 
of the latest ATARI cata- 
log packed with your 
ATARI 1200XL Com- 
puter. The ATARI cata- 
log is an excellent guide 
to the world of ATARI 
Home Computer 


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These keys let you choose among 
the variations within a program 

Special-Function Indicators 
These light up when your computer's 
keyboard has been deactivated (LI) or 
is in the international character set (L2) 

Power On Indicator 

A quick glance lets you see 
whether your computer is on c 

Power On/Off Switch 


Stops a program, then restarts it 
from the beginning 

Cartridge Slot 
Plug-in cartridges 
provide quick and easy 
program loading 

Joystick or Paddle Controller Jacks 
One or two players can challenge 
the computer— or each other- 
through these connectors 

Controls a variety of features 
when pressed simultaneously 
with another key 

ESC Key 

Moves you from one menu to another 
in many ATARI programs 

TV Channel Select Switch 
Lets you pick between 
channel 2 or 3 for the 
clearest picture possible 

Television Monitor Jack 
Provides access to a monitor's 
superior color reproduction 

Serial Input/Output Ports 
Lets you connect peripheral equipment 
such as disk drives, program recorders, 
or printers to your computer 

Video Mode Key 

Highlights the words 
and phrases you type 

Special-Function Keys 
Many of your computer's operations— single- 
key cursor movement, for example— are 
controlled by Fl, F2, F3, and F4 


DELETE BACK SPACE Key Interrupts certain functions 

Erases letters, words, 
or entire sentences 


Lets you type 

all uppercase letters 

T, i, — , - Keys 

When used in conjunction with CONTROL, 
these keys move the cursor up, down, 
left, and right 


Initiates your computer's 

diagnostic self-tests 

Toui ATARI 1200XL 
Home Computer is easy 
to set up. It comes with 
everything you need to 
get your system running: 
a TV Switch Box and con- 
necting cable to connect 
the computer to your 
television set and an AC 
Power Adapter. And the 
only tool you'll need is a 

The ten easy steps on 
these pages show you 
how to connect your 
ATARI 1200XL Home 
Computer to your televi- 
sion set. 

1 Disconnect the 
present antenna or 
cable TV line from your 
television set and recon- 
nect it to the side of the 
TV Switch Box labeled 
ANTENNA. If the antenna 
line is a flat, twin-lead 
cable, connect it to the 
terminals marked 300 
OHM on the switch box. 
If it's a round cable— a 
coaxial cable from an ex- 
ternal antenna or a thin 
cable from a built-in 
antenna— attach it to the 
threaded connector 
marked 75 OHM. 

2 Connect the short, 
twin-lead cable on 
the TV Switch box to the 
VHF connection on your 
TV set. If the VHF con- 
nection on your set has 
two screw-type ter- 
minals, secure the two 
cable leads to the ter- 
minals. If the VHF con- 
nection on your TV is a 
round threaded terminal, 
the TV Switch Box cable 
must be attached to the 
adapter supplied with 
your TV set. 

First, connect the twin 
leads of the TV Switch 
Box cable to the two 
screw- type terminals on 
the adapter. Then slip or 
screw the adapter onto 
the threaded terminal on 
your TV set, making sure 
that the pinlike projection 
in the adapter makes 
contact. (If no VHF 
adapter was supplied 
with your TV set, you can 
purchase one at a local 
video store.) 

3 Peel off the protec- 
tive cover from the 
self-adhesive square on 
the TV Switch Box and 
press the switch box to 
the back of your televi- 
sion set so it sticks to the 

If you've connected the 
TV Switch Box to a flat, 
twin-lead cable, you're 
now finished installing 
the TV Switch Box; go to 
step 5. . 

4 If you've connected 
the TV Switch Box 
to a round (75-OHM) 
cable and you did not 
use the adapter de- 
scribed in step 2, you 
may need to adjust the 
antenna terminal on your 
TV set so it can accept 
the 300-OHM signal from 
the TV Switch Box. Make 
the necessary adjust- 
ments as shown in the 

If the back of your set 
looks like this, push the 
switch to the 300-OHM 
(300fl) position. 

If it looks like this, 
loosen the screws hold- 
ing the U-shaped slider 
and move the slider to 
the position marked 300 
OHM (or 300 0). 

If it looks like this, in- 
sert the tiny wire into the 
hole in the center of the 
antenna terminal. 

5 Move the sliding 
switch on the TV 
Switch Box to the COM- 
PUTER position. (Don't 
forget to slide this switch 
back to the TV position 
when you're finished us- 
ing your computer and 
want to watch regular TV 

7 Connect the AC 
Power Adapter to 
an electrical outlet. The 
cable with the round 
plug slips into the 
POWER IN jack on the 
back of your computer. 
The standard two- 
pronged plug goes into a 
wall outlet. 

' connecting cable 
into the terminal marked 
Switch Box. Plug the 
other end into the jack 
labeled SWITCH BOX on 
your computer. 

8 Turn on your TV 
set and tune it to 
Channel 2 or 3— which- 
ever channel has the 
weakest signal in your 

9 Set the Channel 
Select Switch on 
the back of the computer 
console (it's next to the 
POWER IN jack) to the 
same channel. After you 
turn on your computer, 
you may need to adjust 
the fine-tuning knob on 
your TV set to improve 

1200XL Home 
Computer is now ready 
to be turned on. The 
main power switch is 
located on the left side of 
the computer console be- 
hind the cartridge slot, A 
few seconds after you 
turn your computer on, 
you'll be greeted by the 
word ATARI pulsating 
with a rainbow of rapidly 
changing colors. 

If you leave the compu- 
ter on one display long 
enough, you may notice 
the colors on your TV 
screen changing periodi- 
cally. This is normal and 
occurs to protect your 
TV set. 

Please note, also, that 
when you turn off your 
ATARI 1200XL Computer 
to reload a program, you 
must wait 3 to S seconds 
before turning it back on. 


If the word ATARI 
doesn't appear when you 
turn your computer on, 
check over all the pre- 
vious steps. Make sure 
that all cords and cables 
are plugged securely 
and that power is coming 
into the system. (The red 
Power ON/OFF light 
located at the far left of 
the console above the 
keyboard should be on.) 
Try adjusting the fine- 
tuning knob on your TV. 
If you still don't get the 
proper display, your 
computer may need ser- 
vicing. For the location of 
the nearest ATARI Fac- 
tory Authorized Service 
Center, contact your 
ATARI retailer or call 
ATARI Customer Service 
toll-free at the number 
listed on your warranty 

Whenever you turn your 
new ATARI 1200XL 
Computer on, it 
automatically tests 
itself— then lets you dou- 
ble check it with a series 
of built-in self-tests that 
help ensure proper 

These tests check to 
see if the computer's 
memory, sound and col- 
ors, and keyboard are 
working properly. Before 
you run any software you 
purchased for your 
ATARI 1200XL Computer, 
you should remove any 
cartridge, and put the 
computer through the en- 
tire self-test routine. 

Thereafter, you'll need 
to run the self-tests only 
periodically, because 
each time your computer 
is "powered up," the 
computer runs a quick 
self-test on its memory 

circuits. This test ac- 
• „ counts for the slight 

delay that occurs be- 
tween the moment you 
turn the computer on and 
when the word ATARI 
appears on the TV 

If the memory circuits 
ever fail the test, the first 
thing you'll see on your 
TV screen are the words 
MEMORY TEST and sev- 
eral red and green 
squares and rectangles. 
(Any external software- 
cartridge, diskette or 
cassette— that you try to 
plug or load into the 
computer will be 

This means the com- 
puter needs service, and 
you should contact your 
ATARI Home Computer 
retailer or Factory 
Authorized Service 

The HELP key lets you 
initiate your computer's 
self-tests. Pressing HELP 
once while the word 
ATARI is on your TV 
screen displays the self- 
test options— ALL TESTS, 
—on your screen. 

Press SELECT to 
choose which test you 
want, then press START 
to begin the test. Press 
HELP a second time to 
return to the SELF-TEST 

When you select ALL 
TESTS, the computer first 
checks its memory cir- 
cuits. The audio-visual 
and keyboard tests fol- 
low automatically, with 
the computer generating 
random input to the key- 
board during the latter 

Each self-test is 
repeated indefinitely by 
your computer unless 
you press HELP to return 
to the menu or RESET to 
stop all tests and return 
to the word ATARI. 
When you select ALL 
TESTS, all three tests are 
run repeatedly until you 
press HELP or RESET. 

The HELP key also 
performs other functions 
with some ATARI soft- 
ware products. Consult 
the individual program 
user's guide for its exact 

When you select the 
MEMORY self-test, 
you're telling your com- 
puter to check both its 
Read-Only Memory 
(ROM) and Random- 
Access Memory (RAM) 

ROM is permanent, 
noneraseable memory in 
which your computer's 
operating system is 
stored. If anything is 

wrong with it, your com- 
puter may not operate 
properly. RAM is the 
memory your computer 
has available for pro- 
grams you load into it or 
write yourself. 

Two rectangular color 
bars appear on your TV 
screen while the ROM is 
being tested. The bars 
turn green if ROM is 
found to be in good con- 
dition. If either color bar 
turns red at the end of 
the test, your computer's 
ROM is malfunctioning, 
and you should contact 
your ATARI Home Com- 
puter retailer or Factory 
Authorized Service 

During the RAM test, 
48 small color squares 
appear one by one on 
your screen. Each 
square represents a por- 
tion of RAM that is ac- 
tively being used by 
your computer (the 
remaining 16K is acces- 
sible only with certain 
software programs). As 
each section of RAM is 
tested, the corres- 
ponding square turns 
white, then green if the 
section is good or red if 
the section is bad, and 
the LI and L2 indicators 
on the computer go on 
and off alternately. 

It is important that all of 
the squares turn green. 
This means the RAM in 
your computer is func- 
tioning properly. 

test checks your ATARI 
1200XL Home 
Computer's four sound 
voices and color capabil- 
ity. During the test, a 
musical staff and treble 
clef appear on the 
screen above the num- 
ber of the voice under 
test. Six notes are played 
and displayed sequen- 
tially on your TV screen, 
The six notes are 
repeated once for each 
music voice. 

If a voice number ap- 
pears but you don't hear 
music, or if one of the six 
notes played sounds off- 
key, that voice is not 
working properly. 

The colors displayed 
should be consistent from 
test to test. 

A keyboard layout is dis- 
played on your TV 
screen when you initiate 
this test. When you press 
a key on your keyboard, 
the corresponding key 
on the screen flashes in 
inverse video (a blue 
character on a white 
background) and a note 
sounds. The space bar 

and special-function keys 
are already in inverse 
video, so pressing one of 
them changes the match- 
ing key on the screen to 
normal video. If pressing 
a key fails to evoke a 
response on the TV 
screen, that key is not 

The SHIFT and CON- 
TROL keys flash only 
when pressed 
simultaneously with 
another key. 

Please note that the 
RESET keys do not flash 
or sound a note when 
pressed. HELP returns 
you to the SELF-TEST 
menu while RESET takes 
you back to the word 

With a few exceptions, 
your ATARI 1200XL 
Computer keyboard's 
layout— the numbers, let- 
ters, and symbols— is 
identical to that of a 
conventional typewriter. 

You'll quickly discover, 
however, that the key- 
board of your ATARI 
1200XL Home Computer 
has a wide range of addi- 
tional capabilities. You 
can change text at will 
on your screen, draw 
with special graphics 
characters, and display 
certain international lang- 
uage characters on your 
TV screen. 

The next 4 pages de- 
scribe the various ways 
you can employ the 
special features of the 
keyboard to make the 
most efficient use of your 
ATARI 1200XL Home 
Computer. You'll want to 
keep this guide handy 
for future reference 
when you're working 
with specific programs. 

ATAR1 1200 XL 


If you've used a 
typewriter, you'll know 
how to use the keyboard 
of your ATARI 1200XL 
Computer. The SHIFT 
key capitalizes letters, 
RETURN moves the cur- 
sor to the left margin, 
and TAB moves the cur- 
sor quickly across your 
screen to predetermined 

Beyond these basics, 
there are keys that can 
unlock other powers 
within your ATARI 
1200XL Computer. The 
keys play important roles 
in screen editing and in 
generating both graphics 
and international 
characters. They can 
help you move the cur- 
sor, delete or insert in- 
dividual characters or 
entire sentences, or 
change from uppercase 
to lowercase letters. 

The chart on this page 
describes the function of 
each special key and 
details the various com- 
binations of keys used to 
edit programs, words, or 
paragraphs, to move the 
cursor, and to change 
the way information is 
displayed on the screen. 

Since the standard key 
functions are sometimes 
redefined by certain pro- 
grams, always consult 
your program user's 
guide for further help. 

The white square you 
see on the screen is the 
cursor; it shows you 
"where you are" on the 

When you use CON- 
TROL or SHIFT in com- 
bination with another 
key, press the two keys 

Stops the computer in the 
middle of what it's doing 
and restarts the program 
from the beginning. 


Usually tells the computer to 
begin running a game or 
program; refer to the in- 
dividual program instruc- 
tions for its exact function. 


Often used to select one of 
several applications within a 
program; its function varies 
from program to pro- 
gram—refer to the in- 
dividual program instruc- 
tions for its exact use, 


■ Moves the cursor 
up one line without 
changing the pro- 
gram or display. 

Moves the cursor 
one space to the 

Moves the cursor 
one space to the 

Runs your ATARI 1200XL 
Computer through a senes 
of self-tests when the word 
ATARI is on the TV screen. 
Other functions depend on 
the program in use— refer to 
the individual program in- 


Video mode Usually swit- 
ches the TV display of 
entered text from normal to 
inverse video (blue char- 
acter on white background) 
and back again. (With some 
ATARI software products, 
this key is referred to as the 
A key). 

Usually interrupts whatever 
function the computer is 
performing; refer to in- 
dividual program instruc- 
tions for its exact function. 

Depends on the program; 
for example, pressing ESC 
may be used to take you 
from one menu to another. 

Allows you to insert a space 
in some programs. Charac- 
ters may be inserted by typ- 
ing over the inserted space. 

Moves the cursor back one 
space, deleting what was 
typed. If held down, it con- 
tinues deleting characters. 

Freezes the TV display 
produced when you list a 
program. This allows the 
program to be read easier. 
Press CONTROL 1 a second 
time to restart the program 

Deactivates the computer 
keyboard (LI is on when the 
keyboard is deactivated), 
This lets you leave the com- 
puter on without worrying 
about anyone else changing 
your work. Press CONTROL 
Fl a second time to 
reactivate the keyboard. 


Turns off the computer's 
output to your TV screen, 
which allows the 1200XL to 
work about 25 percent 
faster, Press any key except 
SELECT to turn the screen 
display on again. 

Deactivates the typewriter 
key-click audio output to 
your TV or monitor speaker. 
Other program-generated 
sounds will still be pro- 
duced. Press CONTROL F3 
a second time to turn the 
key-click sound back on. 


Switches the TV display to 
the international language 
characters. See page 12, 
"International Character 
Set," for details. Press 
CONTROL F4 a second time 
to return to the regular 
keyboard output. 

Alternates the keyboard 
output between all upper 
and lowercase letters. In 
some programs, you must 
press SHIFT CAPS while 
others do not allow you to 
switch between the two (up- 
percase only). 

Locks CONTROL in the 
"down" position. Press 
SHIFT to unlock. 

Moves the cursor to the up- 
per left corner of the screen 
(the "home" position). 

Moves the cursor to the 
lower left corner of the 

Moves the cursor to the 
beginning of the line it's 
currently on. 

Moves the cursor to the end 
of the line it's currently on. 

Deletes from the position of 
the cursor to the beginning 
of a line in some programs. 

A variety of graphics 
characters is built into 
your ATARI 1200XL Com- 
puter's keyboard. Press- 
ing CONTROL and F4 
simultaneously switches 
your display between the 
graphics and interna- 
tional characters. 
Graphics characters 
allow you to build 
graphs, design charts, 
and draw pictures. The 

chart on this page shows 
the 29 characters 
available and the key 
you must press— in com- 
bination with CON- 
TROL— to display each 


ATAR1 1200 XL 

H^HBSb^ ■ ■ ■ 

H o < > 
■ i '♦Ml 

j m 


An international 
language character set is 
built into the keyboard of 
your ATARI 1200XL Com- 
puter. Pressing CON- 
TROL and F4 
simultaneously switches 
your computer's display 
between the international 
and graphics characters 
(see page 11). The chart 
on this page shows the 
international characters 

available and the key 
you must press— in com- 
bination with CON- 
TROL— to display each 

Without software, com- 
puters are little more 
than elaborate electronic 

It is software— the step- 
by-step list of instructions 
also known as a pro- 
gram—that adapts your 
computer's abilities to a 
specific job, whether it's 

storing names and ad- 
dresses, becoming your 
personal bookkeeper, or 
giving you a video ar- 
cade at home. 

It's up to you to decide 
which ready-to-use soft- 
ware you'll need to take 
your ATARI 1200XL Com- 
puter beyond the self- 
tests. There are a 
number of factors you 
should study, however, 
in looking for software to 
make your computer 
work most effectively. 

You'll want to consider 
costs, of course, not only 
of the software itself (car- 
tridge, cassette or 
diskette), but also of the 
additional hardware (pro- 
gram recorder or disk 
drive) that you may need 
to use the software. Your 
personal interests, 
however, will play a 
leading role in your 
selection of software. 

You'll need to ask 
some important ques- 
tions; Are there children 
in your family who will 
benefit from Atari's many 
educational programs? 
Are you trying to make 
your home business 
more profitable? Will you 
want to use your com- 
puter to write reports? 
Will your computer also 
serve as an entertain- 
ment center? 

The kind of software- 
cartridge, cassette or 
diskette— you intend to 
use with your computer 
will play a major role in 
deciding what periph- 
erals such as disk drives 
or printers you want to 
add to your system. 

If you plan to just use 
cartridges, for example, 
you may need only joy- 
sticks or paddle control- 
lers. Cartridges plug 
directly into the slot on 
the left side of your 
ATARI 1200XL Computer, 
so no additional periph- 
eral is required to run 

Most of ATARI'S popu- 
lar video games come on 
cartridges, which pro- 
vide almost instant pro- 
gram loading and are 

practically indestructible. 
But because cartridges 
are ROM-like devices, 
they won't store informa- 

If you do want to save 
data— or decide to pur- 
chase any of ATARI'S 
powerful ready-to-use 
software programs on 
cassettes or disk- 
ettes—then you will need 
to consider buying addi- 
tional hardware. 

Start with a pair of joy- 
stick controllers. Add a 
program recorder or 
disk drive. Then a 
printer . . . perhaps a 

There's an ATARI 
accessory device that 
will make your computer 
more versatile and effi- 
cient, whether it's play- 
ing a video game, writing 
a report, or hooking up 
to a home- information 

The first piece of hard- 
ware you'll probably 
consider is a program 
recorder or disk drive. 
They both provide safe 
and reliable storage for 

information you want to 
save when you're using 
your computer. Each has 
its own advantages. 

A program recorder 
uses inexpensive cas- 
sette tape, which is wide- 
ly available and easy to 
use. And it can replay 
sound recorded along 
with other data on the 
cassette tape. A program 
recorder is also the most 
economical way to store 

But most people ex- 
perienced with compu- 
ters prefer to store infor- 
mation on a disk drive. 
To appreciate why, it's 
necessary to understand 
how each device works. 

A program recorder- 
like a conventional cas- 
sette tape recorder- 
stores data serially. That 
is, it saves data in se- 

quence on tape. If you've 
stored five documents on 
a cassette and you want 
to recall the last one 
recorded, you first have 
to advance the tape past 
the first four to find the 
information you want. 
This can be a time-con- 
suming and imprecise 

A disk drive can load 
the same program in a 
few seconds. That's 
because information on a 
"floppy" diskette, a thin, 
pliable sheet of mylar 
covered with magnetic 
recording material, is 
stored in sectors similar 
to the cuts on a record. 
Just as you can set the 
needle down on any 
band on a record- 
without listening to the 
other songs— a disk drive 
can go directly to any 
sector of a diskette and 
"play" that information 
into your computer's 

1 1 

This is one reason why 
a disk drive stores data 
so quickly. A disk drive 
also records an index on 
one sector of each disk- 
ette. This directory tells 
the computer the exact 
location of each file of in- 

Of course, disk drives 
are more expensive than 
program recorders. But 
for speed, power, and 
convenience, you may 
find a disk drive a worth- 
while investment. 

A printer can be a prac- 
tical addition to your 
ATARI 1200XL Computer 
system. It lets you take a 
close look at what you've 
written, analyze or make 
notes on program list- 
ings, or print letters and 

Your particular appli- 
cation will determine 
which type of printer 
you'll need. 

If the majority of your 
printing will be program 
listings, then a 40-column 
printer will probably- 
meet your needs. Some 
even possess four-color 
plotting capability that 
allows them to draw 
charts and graphs. 

Eighty-column printers, 
however, offer a variety 
of features that make 
them worth the invest- 
ment to many ATARI 
Computer owners. 
Eighty-column (full-page) 
printers are necessary if 
you need to produce let- 
ters or reports. Full-size 
printers are also neces- 
sary if you want to print 
the bookkeeping records 
produced by an account- 
ing program. 

Intrigued by the pro- 
mises of high-speed 
home information ser- 
vices? There's a periph- 
eral device called a 
modem that lets you 
transmit and receive 
information from these 
and other sources over 
standard telephone lines. 

The word modem 
stands for ' "modulator- 
demodulator." A modem 
translates— or modu- 
lates— digital information 
from your computer into 
signals that can be sent 

over phone lines. It also 
demodulates incoming 
signals from the phone 
into digital information 
for your computer. This 
two-way translation pro- 
cess allows your com- 
puter to "talk" to other 
computers all over the 

An ATARI modem 
gives you access to com- 
puter data bases, trans- 
portation and entertain- 
ment schedules, and a 
variety of specialized 
information systems such 

It's well worth your while 
to get to know other 
ATARI Computer 
owners— many are 
experienced program- 
mers who have devel- 
oped exciting games and 
helpful programs of their 

Chances are there's an 
ATARI Users' Group in 
your area— more than 
250 of these clubs 
throughout the world 
meet periodically to ex- 
change programs and 
ideas. You'll find that 
other ATARI Computer 
owners are eager to help 
the beginning or would- 
be programmer. 

Many local users' 
groups also publish regu- 
lar newsletters which fea- 
ture articles about other 
ATARI Computer users 
and the programs 
they've written, sched- 
uled meetings, and 
reviews of new hardware 
and software products 
for your ATARI Com- 

If you can't locate the 
ATARI Users' Group m 
your area, contact the 
ATARI User Group Sup- 
port Staff at 60 E. 
Plumena, Box 60047, San 
Jose, CA 95150, They'll 
put you in contact with a 
local users' group— or, if 
there isn't one in your 
area, give you informa- 
tion and advice you'll 
need to start c 

APX-the ATARI Pro- 
gram Exchange— offers a 
good sampling of the 
programs ATARI Home 
Computer owners have 
written. Atari created 
APX to distribute user- 
written software for 
ATARI Computer users. 

APX holds quarterly 
contests to pick the best 
of the programs devel- 
oped by ATARI Com- 
puter users, then pub- 
lishes a quarterly catalog 
listing the products avail- 
able. All APX programs 
are available by mail, 
and many ATARI 
retailers carry APX 
software. You can 
obtain copies of the 
APX catalog at 
your ATARI retailer. 

Like any electrical appliance, 
this ATARI Home Computer 
uses and produces radio fre- 
quency energy. If it is not in- 
stalled and used properly 
according to the instructions in 
this guide, the equipment may 
cause interference with your 
radio or television reception. 

It has been type tested and 
found to comply with the limits 
for a Class B computing device 
in accordance with the speci- 
fications in Subpart J of Part 15 
of the FCC rules. These rules 
are designed to provide 
reasonable protection against 
such interference when the 
equipment is used in a residen- 
tial setting. However, there is 
no guarantee that interference 
will noi occur in a particular 
home or residence, 

If you believe this equipment 
is causing interference with 
your own radio or television 
reception, try turning the equip- 
ment on and off. 

If the interference problem 
stops when the equipment is 
turned off, then the equipment 
is probably causing the inter- 
ference. With the equipment 
turned on, you may be able to 
correct the problem by trying 
one or more of the following 

• Reorient the radio or televi- 
sion antenna, 

• Reposition the equipment in 
relation to the radio or televi- 

WARNING: Only peripheral 
equipment certified to comply 
with Class B regulations as 
defined in Subpart ] of Part 15 
of the FCC rules should be at- 
tached to this computer. 

Operation of noncertified pe- 
ripherals with this computer is 
likely to result in interference 
to radio and TV reception. 

Every effort has been made 
to ensure the accuracy of the 
product documentation in this 
manual. However, because we 
are constantly improving and 
updating our computer soft- 
ware and hardware, Atari, Inc. 
is unable to guarantee the ac- 
curacy of printed material after 
the date of publication and 
disclaims liability for changes, 
errors or omissions. 

No reproduction of this docu- 
ment or any portion of its con- 
tents is allowed without the 
specific written permission of 
Atari, Inc., Sunnyvale, CA 

Printed in Taiwan 

© 1982 Wan, Inc. All rights reserved